Multi-account mail

When more than one Gmail or Microsoft 365 mailbox is connected, Liminal must know which account owns a thread before it drafts or sends. v0.1.2 added first-class multi-mailbox support across search, compose, and session memory.

Connected mail only

mail_oauth_filter and list_connectors expose Connected mailboxes: accounts with mail OAuth scopes that are actually linked in Integrations. The harness ignores:

• Providers you have not connected
• Entra #EXT# guest admin mailboxes that are not the user's primary mail

Rule R-EMAIL-ACCOUNT tells the model to call mail_search_inboxes before probing MCP or REST on unconnected providers.

Scan all inboxes

mail_search_inboxes searches every connected Gmail/Outlook account in one call. Use it for:

• "What needs a reply today across all mailboxes?"
• Finding which account received a thread before composing a reply
• Inbox triage before the Inbox watcher labels mail

Privacy redaction

By default redact_sensitive: true masks SSNs, card numbers, phones, and addresses in snippets returned to the model. Rule R-EMAIL-PRIVACY applies when the user asks to summarize mail without leaking secrets.

The operator can set redact_sensitive: false for full bodies when appropriate (trusted environment only).

Implementation: packages/core/src/email_redaction.ts.

Replying from the correct mailbox

When multiple accounts are connected, compose and send tools require account_hint: the mailbox email or account id from mail_search_inboxes / thread metadata.

Tool	account_hint
gmail_create_draft	Required when >1 Gmail account
gmail_send_message	Required when >1 Gmail account
gmail_send_draft	Use draft from the same account
Outlook REST compose/send	Same pattern for Microsoft

Session state: successful mail_search_inboxes hits update mail_account_context so the next turn remembers the mailbox + threadId / messageId without re-explaining.

Recommended agent flow

1. mail_search_inboxes (with redact_sensitive as needed)
2. Pick the row for the thread you will answer
3. gmail_create_draft or gmail_send_message with account_hint + thread_id from that row
4. User approves send

For styled HTML outbound mail, prefer REST gmail_create_draft / gmail_send_message, not plain MCP draft tools. See Google Workspace — Rich email.

UI

• Integrations shows each connected mailbox per provider.
• Revoke removes one account via revoke_integration_account without disconnecting sibling accounts.

Related

• Connectors & Integrations hub
• Google Workspace
• Microsoft 365
• Inbox watcher
• Compose dock & attachments